Xvnnxss



(No Model.)

G. W. WRIGHT.

BENCH PLANE.

Patented Mar. 2l, 1893.

ma Norms :1L-rens co. Pwomumo.. WASHINGTON, n c

NrTnD STATES PATENT OFFICE.

GRANVILLE W. VRIGHT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE SARGENT95 COMPANY, OF SAME PLACE.

PLANE.

SPECIFICATION forming part of Letters Patent No. 493,903, dated March21, 1893.

Application filed October 19, 1891.

.To all whom it may concern:

Be it known that I, GRANVILLE W. WRIGHT, of New Haven, in the county ofNew Haven and State of Connecticut, have invented a new Improvement inBench-Planes; and'I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,

1o and which said drawings constitute part of this specification, andrepresent, in-

Figure 1, a 4longitudinal central section of the plane complete; Fig. 2,a top or plan View of the stock with the bit removed; Fig. 3, an

I5 under side or rear view of the bit; Fig. 4, a transverse sectioncutting on line of Fig. 1 looking forward.

This invention relates to an improvement in that class of bench-planesin which the 2o stock is made from metal, and in which the bit is mademechanically adjustable both as to depth of cut and as to transverseposition, and particularly to those planes of this class in which thebit is single, that is without an 2 5 adjustable cap upon its face. Inthe more general construction of planes of this character the transverseadjustment of the bit to vary its edge with relation to the face of thestock, is produced by a lever hung in the 3o stock below the bit, thelever constructed with a projection which will extend up into a notch orslot in the bit, consequently the wear to which the bit may be subjectedis considerably limited, as after a little wear, the point 5 5 0fengagement of the bit with the adjusting lever will have passed so fardown from the lever as to prevent such engagement, consequently after alittle wear the bit must be exchanged for a new bit with which theadjust- 4o ing-lever may engage.

The object of my invention is to provide the lever a laterally adjustingarrangement,but so as to make the extent of wear to which the bit may besubjected unlimited so far as the adjusting device is concerned, and itconsists in the construction hereinafter described and particularlyrecited in the claims.

A, represents the stock, of usual construction, B, the bit which isadapted to rest upon 5o the bed below, in the usual manner, and upon itsupper side is arranged a clamping lever C,

Serial No. 409,156. (No model.)

which engages with a screw D, from the bed, through a slot in the bit,and between the bit and the lever above or in rear of the screw D, anadjusting-screw E, is arranged provided with a head F, by which it maybe rotated. One end of the screw is threaded into a corresponding nut inthe lever C, and the other end bears upon the upper side of the bit, sothat by turning the screw, the bit will be 6o clamped upon its bed, orreleased therefrom, accordingly as the screw is turned in one directionor the other, a common and well known device for securing the bit inplace.

Upon the under side of the bit a toothed rack G, is formed, into whichthe teeth II, of a segment or lever I-I hung upon an axis I, below thebit work, the hub of the segment extending rearward, forms an arm J, bymeans of which the segment may be swung in alon- 7o gitudinal plane forthe adjustment of the bit to produce a greater or less extent of depthof cut. The segment is operated by means of an adj usting-screw K, inawell known manner. Upon the under side of the bit a lever is hungdirectly to the bit, upon a pivot L. As here represented the lever is ofthin metal, and the pivot is screwed through a correspondinghole in thelever into the bit, so as to permit the lever to swing freely. One arm8o M, of the lever extends rearward, and terminates in a suitable handleN, the other arm O, extends downward below the pivot L, and as seen inFig. 3. On the stock below the bit, a longitudinal recess is formed bytwo upwardly projecting ribs or long .narrow posts P P, see Figs. 2 and4. These ribs are parallel with each other and with the plane-stock withrespect to the length thereof, and have their upper edgescorrespondingly 9o inclined forward to form the rear support of theplane-bit which has bearing upon them. The distan ce between the tworibs corresponds to the width of the end of the arm O, of the laterallyadjusting lever, so that when the bit is set in place, the lower end ofthe arm O, will stand in the recess between the two ribs P P so thatthese ribs will form a fulcrum, upon which the lever may swing to theright or left, and as the lever is so swung, as indi- 10o cated inbroken lines Fig. 3, the fulcrum end of the arm O, being held fast inthe recess between the ribs P P, it follows that the pivot L, will bemoved accordingly, and that the end of the bit will be turned to theright or left, and such turning of the bit changes the parallelism ofthe edge of the bit with relation to the plane of the face of the stock.

When lateral adjustment is required to bring the edge of the bitinto theproper parallelism with the plane of the stock, the laterally adjustinglever is turned accordingly, as before described. It is to be observedvthat the two levers by which the squaring of the bit is effected andthe depth of the cut is gaged, respectively, act entirely independentlyof each other so that the operation of one does not affect the operationof the other, the two levers having independentconnection with the bit.

By hanging the lever directly to the bit instead of to the stock, itmaintains always the same position with relation to the bit; as the bitwears away the lever simply extends farther downward into the recessWithin which its lower arm O, works, and so that the bit cannot getbeyond the control of the lever because of the wearing away of the bit,as by grinding, tbc. The construction is simple and very effective.

As herein shown, the axis or horizontalpin I, on which the segment orlever H', is hung, is located between the said ribs or posts P P in avertical slot P', formed midway of .the length of a web P2, which joinsthe said posts or ribs with which it is made integral.

From the foregoing it will be understood that I do not claim broadly abench-plane having the bit laterally adjustable, but I am aware thatplanes have been constructed with a lateral adjusting lever hung to theunder side of the bit, and so as to take its fulcrum on the stock, butinsuch case it has been necessary to make the lever adjustable on the bit,whereas by constructing the stock with a longitudinal recess withinwhich the end of the lever may work as a fulcrum, the permanent hangingof the lever to the bit is made practicable. I do nottherefore wish tobe understood as broadly claiming hanging the lateral adjusting leverdirectly to the bit.

WhatI do claim as my invention, and desire to secure by Letters Patent,is-

1. In a bench-plane, the combination with a stock constructed at itsrear end with a central longitudinal recess, of a bit, and anadjusting-lever pivotally attached to the outer end of the same, andextending rearward to be grasped for manual operation, and forward anddownward to enter between and engage with the parallel side walls of thesaid recess at different points in the length thereof according to theposition of the bit in the planestock, the said walls forming points ofpurchase for the operation of the lever in squaring the bit in thestock, substantially as set forth, and whereby the lever is alwayspreserved in its right relation to the bit, although the same mustconstantly be moved forward in the stock as it becomes shorter throughwear and grinding.

2. In a bench plane, the combination with a stock constructed at itsrear end with two vertical ribs or posts extending parallel with eachother and with the stock, and having their upper ends forwardly inclinedcorrespondingly; of a bit having its rear support upon the said inclinedupper ends of the said ribs or posts, an adjusting-lever mounted in thestock for vertical movement, and engaging directly with the bit which itadjusts vertically, and an adjusting lever pivotally secured to the rearend of the said bit, and eX- tending rearward for manual operation andforward to enter between and engage with the said ribs or posts atdifferent points in the length thereof according to the position of thebit in the stock, the said ribs forming points of purchase for theoperation of the lever in squaring the bit in the stock, substantiallyas set forth, and whereby the said lever last mentioned is alwayspreserved in its right relation to the bit, although the same must beconstantly moved forward in the stock as itbecomes shorter through wear,and grinding, whereby also the two levers act on the bit independentlyof each other.

3. In a bench-piane the combination with a stock constructed at its rearend with two vertical ribs or posts parallel with each other and withthe length of the stock, having their upper ends forwardly inclinedcorrespondingly, and joined by a vertically slotted web which is locatedbetween them; of a bit having its lower face provided with alongitudinal rack and having its rear support upon the said posts; anadjusting lever pivotally secured to the outer end of the said bit tothe rear of the said rack, and extending rearward for manual operation,and forward to enter between and engage with the said posts or ribs atdifferent points in the length thereof according to the position of thebit in the said stock, the said ribs forming points of purchase for theoperation of the lever in squaring the bit in the stock; a lever pivotedin the vertical slot formed in the web between the ribs, and taking atits forward end into the rack formed in the lower face of the bit; andmeans for adjusting the said lever up and down, substantially as setforth, and whereby the adjusting lever pivoted to the bit is alwayspreserved in its right relation thereto, although the same mustconstantly be moved forward in the stock as it becomes shorter throughwear and grinding.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

GRANVILLE W. WRIGHT.

Witnesses:

WILLIAM S. COOKE, CHAs. L. BALDWIN.

IOO

